201035632 六、發明說明： 【發明所屬之技術領域】 本發明係涉及光學膜片之改良，特別是一種應用背光 « ^ 模組中，可達到光線集中且释度增加之光學膜片及其製造 v 方法。 【先前技術】 針對多媒體社會之急速進步，多半受惠於半導體元件 ^ 或人機顯示裝置的飛躍性進步，就顯示器而言，陰極射線 管（Cathode Ray Tube，簡稱CRT)因具有優異的顯示品質與 其經濟性，一直獨占近年來的顯示器市場。然而，對於個 人在桌上操作多數終端機/顯示器裝置的環境，或是以環保 的觀點切入，若以節省能源的潮流加以預測，陰極射線管 因空間利用以及能源消耗上仍存在很多問題，而對於輕、 薄、短、小以及低消耗功率的需求，無法有效提供解決之。 因此，具有高晝質、空間利用率佳、低消耗功率、無輻射 專優越性之液晶顯不益以逐漸成為市場之主流’值得注意 的是’由於液晶顯不裔中的液晶面板本身並不會發光’故 必須藉由背光模組提供液晶面板所需之面光源，使得液晶 面板達到顯示的效果，同時獲得足夠之亮度與對比。 而一般背光模組主要包含有光源以及複數光學膜片， 光源得以通過各光學膜片得到較為均勻且亮度較高之光線 後，再由液晶面板射出；其中，為節省光學膜片之使用及 降低背光模組之厚度，出現有一具增光及擴散功能之光學 膜片，如台灣發明專利公開號第200720711號，專利名稱「用 201035632 於背光單元之光擴散片及其製造」，如第一圖所示，該光擴 散片1設有一透明基板11，該透明基板11上有複數隨機不規 則分佈之半球狀結構12，以達到光源擴散及增光之雙重效 ^ ° ' ' ' 如第二圖所示即為該光擴散片1應用於側光式背光模 組之結構示意圖，該背光模組2係設有導光板21及光源22， 而該光擴散片1則設於該導光板21上方，該光源22之光線係 經由導光板21射入上方之光擴散片1，光線先進行擴散後再 進入各半球狀結構12，雖然光線藉由各半球狀結構12可達 到增光之效果，但由透明基板11形成大角度之光線進入半 球狀結構12時，該半球狀結構12之弧面會使光線折射角度 增加，進而使得整體光線折射角度較大，而無法達到有效 將光線集中且提高輝度之效果。 【發明内容】 本發明係提供一種應用背光模組中，可達到光線集中 且輝度增加之光學膜片及其製造方法。 為達上述目的，本發明之光學膜片係設有擴散層及增 光層，其中該光學膜片底側係設有複數間隔排列之反射 區，而各反射區之間係設有透光孔，該光學膜片應用於背 光模組中時，部分光線經由透光孔直接射出，並由上方擴 散層及增光層射出，可達到光線集中且輝度增加之效果。 【實施方式】 為能使貴審查委員清楚本發明之結構組成，以及整 201035632 體運作方式，茲配合圖式說明如下： 本發明學膜片及其製造方法及所應用之背光模 •組」，如第三圖所不，該光學膜片3係設有擴散層31及增光 層32,射該光學膜片3底侧係設有&數間隔排列之反射區 33而各反射區33之間係毁有透光孔，如圖所示之實施 例中，該增光層32係設於讀擴散層31上方，而該擴散層31 貝又於各反射區33上方’且該增光層係設有複數突出表 面之微結構321(可以為微透鏡或棱鏡結構），該反射區係以 ❹一基材為主體（®中未標示），岐基材㈣設有反射材或 者該基材上則設置有反射材，其中設置於該基材内之反射 材可以為白色反射粒子（例如二氧化鈦或硫酸鋇），而設置 於該基材外之反射材可以為銀。 其中，该透光孔34之位置大致落在相對於該微結構321 之犬起位置Μ處，請同時參閱第四圖所示，且該透光孔34 之寬度wi約為1/2〜1/4微結構之寬度W2。 而本發明之光學膜片3應用於背光模組中時，如第五圖 CJ所不，該背光模組係設有導光板41、光源42、反射片43以 及本發明之光學膜片3，該導光板41係設有一入光面411、 一與该入光面411相交之底面412、一與該底面412相對之出 光面413 ’該光源42係設於該導光板41之入光面411，該反 射片43係設於該導光板之底面412下方，而該光學膜片3係 设於該導光板出光面413之上方，。 當光源42之光線透過導光板41朝出光面射出並進入光 學膜片3時’部分大角度之光線P1會被反射區33反射至導光 板41再進行~次折射作用，而部份小角度之光線P2會直接 201035632 穿匕透光孔34，朝上方之擴散層31及增光層％射入，進行 ,續擴散及增光之作用’且該透光孔34之位置大致落在相 ^於^結構321之突起位⑽處，故該小角度之光線邮 由說结構3 2 l·之弧面射出時，其折射角度，較小"而使整體 光、束射出之肖度|父小’進而達到光線集中且輝度增加之效 ，；當_導光板底面412可進—步設有複數網触 第六圖所示。 再者’該光學膜片之製造方法如第七圖所示，係 包含有下列步驟： A、提供-反射片51，請同時參閱第人圖所示，該反 =51係以—基材為主體，而該基材内係設有反射材（圖 中未標不），該基材可以為PET，而該反射材可以為白色反 射粒子（可以為二氧化鈦或硫酸鋇），或者，該反射片係以 一基材為主體，㈣基材上則設置有反射材（可以為銀）、； 、B、、透光孔成型步驟，係可藉由模具52於該反射片幻 上進订冲壓，使該反射片51上形成複數間隔排列之透光孔 34，而各透光孔34之間則形成反射區幻； ^ C提i、光學膜片半成品3’，該光學膜片半成品3, 係设有擴散層31及增光層3 2 ; D、組裝步驟’係藉由黏貼件53將該間隔有透光孔μ 之反射區33固定於該光學膜片半成品3,之底側。 /藉上述之步驟則完成光學膜片3之結構’其中該增光層 32係設於該擴散層31上方，而賴散層糾傻料反射區曰 33上方’言亥光學膜片3應用於背光模組中時，部分光線經由 透光孔直接射出，並由上方擴散層及增光層射出，可達到 201035632 光線集中且輝度增加之效果。 如上所述’本發明提供背光模組一較佳可行之光學膜 -片及其製造方法，羑依法提呈發明專利之申請，·惟，以上 之實施說明及圖式所示，係本發明較佳實施例者：，並非以 此侷限本發明，疋以，舉凡與本發明之構造、裝置、特徵 等近似、雷同者，均應屬本發明之創設目的及申請專利範 圍之内。 ❹ 【圖式簡單說明】 意圖。 第-圖係m具增光及擴散功能之光學膜片 結構示 槿一f二圖係為習用光擴散片應用於側光式背光模組之 f三圖係為本發明中光學臈片之結構示意圖。 =四圖係為本發明中光學膜片之放大示意圖。 示意圖五圖料本發日种光學膜片應料背光模組之結構 結構ί =係為本發财光學膜片應用於背光模組之另-第七圖係為本發明中来舉胺 第八^…片之製造流程方塊圖。 圖ί糸為本發明中背光學腔^ 月尤子犋片之製造流程示意圖。 【主要元件符號說明】 光擴散片1 7 201035632 透明基板11 半球狀結構12 背光模組2 導光板21 光源22 光學膜片3 光學膜片半成品3’ 擴散層31 增光層32 微結構3 21 反射區33 透光孔34 導光板41 入光面411 底面412 出光面413 網點414 光源42 反射片43 反射片51 模具52 黏貼件53201035632 VI. Description of the Invention: [Technical Field] The present invention relates to an improvement of an optical film, and more particularly to an optical film and a manufacturing method thereof, which can achieve light concentration and increased readiness in a backlight module. method. [Prior Art] For the rapid advancement of the multimedia society, most of them benefit from the dramatic advancement of semiconductor components or human-machine display devices. In terms of displays, cathode ray tubes (CRTs) have excellent display quality. Compared with its economy, it has been monopolizing the display market in recent years. However, for the environment in which most individuals operate the terminal/display device on the table, or from the perspective of environmental protection, if the energy saving trend is predicted, the cathode ray tube still has many problems due to space utilization and energy consumption. The need for light, thin, short, small, and low power consumption cannot be effectively addressed. Therefore, LCDs with high enamel quality, good space utilization, low power consumption, and no radiation speciality are becoming more and more popular as the mainstream of the market. It is worth noting that the liquid crystal panel itself is not in the liquid crystal display. It will emit light. Therefore, the surface light source required for the liquid crystal panel must be provided by the backlight module, so that the liquid crystal panel can achieve the display effect, and at the same time obtain sufficient brightness and contrast. The general backlight module mainly comprises a light source and a plurality of optical films, and the light source can obtain a relatively uniform and high-intensity light through the optical film, and then is emitted by the liquid crystal panel; wherein, in order to save the use of the optical film and reduce For the thickness of the backlight module, there is an optical film with a function of enhancing and diffusing. For example, Taiwan Patent Publication No. 200720711, the patent name "Using 201035632 for the light diffusing film of the backlight unit and its manufacture", as shown in the first figure The light diffusing sheet 1 is provided with a transparent substrate 11 having a plurality of randomly arranged hemispherical structures 12 for achieving dual effects of light source diffusion and brightness enhancement as shown in the second figure. The light diffusing film 1 is disposed on the side light type backlight module. The backlight module 2 is provided with a light guide plate 21 and a light source 22, and the light diffusing film 1 is disposed above the light guide plate 21. The light of the light source 22 is incident on the upper light diffusing sheet 1 through the light guide plate 21, and the light is first diffused and then enters each hemispherical structure 12, although the light can be increased by each hemispherical structure 12. The effect is that when the transparent substrate 11 forms a large angle of light into the hemispherical structure 12, the arcuate surface of the hemispherical structure 12 increases the angle of refraction of the light, thereby making the overall light refraction angle larger, and the effective light is not achieved. Concentrate and increase the effect of brightness. SUMMARY OF THE INVENTION The present invention provides an optical film and a method of manufacturing the same that can achieve light concentration and increased brightness in a backlight module. In order to achieve the above object, the optical film of the present invention is provided with a diffusion layer and a light-increasing layer, wherein the bottom side of the optical film is provided with a plurality of reflective regions arranged at intervals, and a light-transmissive hole is disposed between the reflective regions. When the optical film is applied to the backlight module, part of the light is directly emitted through the light transmission hole, and is emitted by the upper diffusion layer and the light enhancement layer, thereby achieving the effect of concentrated light and increased brightness. [Embodiment] In order to enable the reviewing committee member to understand the structural composition of the present invention and the operation mode of the 201035632 body, the following description is made with the following description: The diaphragm of the present invention, the manufacturing method thereof, and the backlight module to be applied, As shown in the third figure, the optical film 3 is provided with a diffusion layer 31 and a brightness enhancement layer 32. The bottom side of the optical film 3 is provided with a reflection area 33 arranged at intervals and between the reflection areas 33. The light-transmitting hole is ruined. In the embodiment shown in the figure, the light-increasing layer 32 is disposed above the read-diffusion layer 31, and the diffusion layer 31 is further above each of the reflective regions 33 and the light-increasing layer is provided. a plurality of protruding surface microstructures 321 (which may be microlenses or prism structures), the reflective regions being mainly composed of a substrate (not labeled in the ®), the substrate (4) being provided with a reflective material or the substrate being disposed There is a reflective material, wherein the reflective material disposed in the substrate may be white reflective particles (for example, titanium dioxide or barium sulfate), and the reflective material disposed outside the substrate may be silver. Wherein, the position of the light-transmitting hole 34 substantially falls at a position relative to the dog of the microstructure 321 , please refer to the fourth figure at the same time, and the width wi of the light-transmitting hole 34 is about 1/2~1 /4 The width of the microstructure is W2. When the optical film 3 of the present invention is applied to a backlight module, as shown in FIG. 5J, the backlight module is provided with a light guide plate 41, a light source 42, a reflection sheet 43, and the optical film 3 of the present invention. The light guide plate 41 is provided with a light incident surface 411, a bottom surface 412 intersecting the light incident surface 411, and a light exit surface 413 opposite to the bottom surface 412. The light source 42 is disposed on the light incident surface 411 of the light guide plate 41. The reflection sheet 43 is disposed under the bottom surface 412 of the light guide plate, and the optical film 3 is disposed above the light guide surface 413 of the light guide plate. When the light of the light source 42 is emitted through the light guide plate 41 toward the light exiting surface and enters the optical film 3, a part of the large-angle light P1 is reflected by the reflective area 33 to the light guide plate 41 to perform a secondary refraction, and a part of the small angle is The light P2 will directly pass through the light-transmitting hole 34 at 201035632, and the diffusion layer 31 and the light-increasing layer% are incident on the upper side, and the effect of continuous diffusion and light enhancement is performed, and the position of the light-transmitting hole 34 substantially falls on the structure of the light-emitting hole 34. The protrusion of the 321 is at the position (10), so the light of the small angle is said to have a smaller angle of refraction when the curved surface of the structure 3 2 l· is emitted, and the overall light and the beam are emitted. The effect of concentrating the light and increasing the brightness is achieved; when the bottom surface 412 of the light guide plate can be stepped into a plurality of net touches as shown in the sixth figure. In addition, the manufacturing method of the optical film is as shown in the seventh figure, and includes the following steps: A. Providing a reflection sheet 51, please also refer to the figure shown in the figure, the reverse type is based on the substrate a main body, wherein the substrate is provided with a reflective material (not shown), the substrate may be PET, and the reflective material may be white reflective particles (which may be titanium dioxide or barium sulfate), or the reflective sheet The substrate is mainly composed of a substrate, and (4) the substrate is provided with a reflective material (which may be silver), a B, and a light-transparent hole forming step, which can be stamped on the reflective sheet by the mold 52. A plurality of light-transmissive holes 34 are arranged on the reflective sheet 51, and a reflective region is formed between the light-transmitting holes 34. The optical film semi-finished product 3', the optical film semi-finished product 3, A diffusion layer 31 and a light-increasing layer 3 2 are provided; D. The assembly step ' is to fix the reflective region 33 with the light-transmissive holes μ to the bottom side of the optical film blank 3 by the adhesive member 53. / The structure of the optical film 3 is completed by the above steps. The light-increasing layer 32 is disposed above the diffusion layer 31, and the scattering layer is disposed above the reflective layer '33. In the module, part of the light is directly emitted through the light transmission hole, and is emitted by the upper diffusion layer and the light-increasing layer, which can achieve the effect of the light concentration and the increase of the brightness of 201035632. As described above, the present invention provides a backlight module which is preferably a viable optical film-sheet and a method for manufacturing the same, and an application for an invention patent is provided according to the law. However, the above description and drawings show that the present invention is DETAILED DESCRIPTION OF THE INVENTION The present invention is not intended to limit the invention, and it should be construed that the construction, the device, the features, and the like of the present invention are similar to those of the present invention. ❹ [Simple description of the schema] Intention. The optical film structure of the first image is a light-increasing and diffusing function. The two-figure diagram is a conventional light-diffusing sheet applied to the edge-lit backlight module. . = Four figures are enlarged schematic views of the optical film of the present invention. The five-figure material is the structure of the backlight module of the optical film. The structure of the backlight module is applied to the backlight module. The seventh figure is the eighth in the invention. ^... The block diagram of the manufacturing process. Figure 糸 is a schematic diagram of the manufacturing process of the back optical cavity ^ Yue Youzi 犋 in the present invention. [Main component symbol description] Light diffusing film 1 7 201035632 Transparent substrate 11 Hemispherical structure 12 Backlight module 2 Light guide plate 21 Light source 22 Optical film 3 Optical film semi-finished product 3' Diffusion layer 31 Light-increasing layer 32 Microstructure 3 21 Reflection area 33 light transmission hole 34 light guide plate 41 light entrance surface 411 bottom surface 412 light exit surface 413 mesh point 414 light source 42 reflection sheet 43 reflection sheet 51 mold 52 adhesive member 53